Bobbin and shuttle combination



F. L. HRMON BOBBIN AND SHUTTLE COMBINATION Filed Aug. 19, 1920 ....g..........w........ a.

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Patented May 27,- 1924.

FRANK L. HARMON, OF BEVERLY', MASSACHUSETTS.

PATENT oFFlcE.

BOBBIN SHUTTLE COMBINATION.

Application :tiled August 19, 1920. `Serial No. 404,618.

To all whom it may concern:

Be it known that I, FRANK L, HARMON, of Beverly, inthe county of Essexand State of Massachusetts, have invented a new and I useful Bobbin andShuttle Combination, of

which the following is a specification, reference being had to thelaccompanying drawings. l

This invention relates to an improved bobbin, and shuttle, and to acombinationthereof, adapted for reliable use to use the longest bobbinthread line possible in dry thread machine sewing with upper threadloops of a given dimension. This combination embodies as a centralfeature, a bobbin, the

thread mass of which is made self-sustaining, and a rigid entity, byhaving the coils thereof crossed, and bound together with a small amountof suitable adhesive sizing,

which is used moist on the line and dried between the coils thereof inthe bobbin-making process, and which is of such nature when dry, or inits normal condition, as to be tough and strong enough to cause the 25,coils to be torn from the thread mass one by one, and cause little or nodust to fly from v the line, and causef a proper degree of bobbin threadtension while the bobbin is used in machine sewing. Such bobbinstructure 80 i's adapted for internal and external bobbin uses i. e. forunwinding either from the inside outward', or from 'the outside inward,to use a relatively great length of thread line with upper thread loopsof a given di- 85 mension, and with a given exterior dimension ofshuttle, for thel reasons,-('1) that the self-sustaining character ofthe dry thread massA adapts it for reliable internal bobbin use,whichadapts it to be used in t0 machine sewing when it is one'inchl indiameter and eight and a half inches long, for example, and adapts itfor use stationarily in the shuttle, which adapts itv to be closelypacked `within the shuttle, and to completely I5 fill th'e shuttle body,and adapts it to be completely used up in d thread machine sewingwithout possibility of 'its collapse or the tangling of its line,and,-(2) adapts the bobbin for reliable external bobbin use instead ofspool bobbins in ordinary machines when the bobbins are made in properformand dimensions to fit their shuttles, or bobbin cases, and tocontainl `as much more thread line than thedisk spool bobbins now usedtherein, as the cubic contents of the disk spools.

This invention will be betterunderstood from the following detaildescription taken in connection with the accompanying drawings andthedistinctive features of novelty pointed-out in theappended claims.

Referring to the drawings:

Figs. 1 and 2 are plan views of a pair of said bobbins and shuttlecombinations adapted for use in a two needle machine.

Flg. 3 is an elevation of a multiple form of self-sustaining bobbincomprising a wrap- 'per cemented to, and around it to hold the multiplebobbin units together.

Fig. 4 is an elevation of the bobbin form shown in Fig. 2; and f Fig. 5is an end View of one of the combinations shown in Figs. 1 and 2.

Referring first to the form shown in Fig. o

3, the bobbin a of the line b comprises ten bobbin units, the threadline b extending from the center of each bobbin unit to its yperipheryand thence to the center of the next bobbin unit throughoutthe series.It, also embodies, as shown, a wrapper c cemented to and around it tohold the bobbin units together.

In the-form shown in Fig. 4, the bobbin d has the same length of line eas the series of bobbin units above described. Each bob. bin d is heldfrom movement in each shuttle f by a felt pad g and a shuttle cap y'pressed into the end of the shuttle between the Wall thereof and thebobbin, this cap being removable by the use of ones thumb nail acting on'the shuttle cap flange c, the end of the shuttle f being slightlycutaway for the purpose. The thread lines e extend through their exitsm, near the tension. holes n, o, and p. The 'shuttle points g formedbythe 95 Hat sides hand z' areelevated as high as the l@ shuttlebodies-to adapt them for use with short needles. The shuttle bodies arecylindrical to it the bobbins d as snug as possible, and the shuttles fare so formed that the bobbins d fillthe spaces in the shuttle bodiesfull of close wound thread line, and so that the' shuttle walls can beused only one sixty fourth of an inch thick to cause the circumferenceof the combination to be as small as possible to adapt the combinationfor use with two inch loops .in machine sewing, while" the, bobbin andshuttle combination,

by virtuetof the bobbin and shuttle structures, are so light that theyare adapted for use at great speed when the bobbins 'd therein are eachone inch in diameterand elght and a half inches long, and when each` hasenough cubic' thread contents to contain fifteen hundred yards of threadline, and lwhen vthe circumference'- Aof each combination shows that itis small enough to be used with taining only about fty yards of threadline,` with two inch loops, and is adapted to use substantially no morelengths of' bobbin thread line continuously with any loops,`

which shows that my bobbin andshuttle combination structurevis adaptedfor continuous bobbin use to sew thirty times more than said voldcombination if my bobbin is adapted for reliable, internal bobbin use inmy shuttle'. To show that it is, I only have to recite the new processfor making it, as

. follows:

rlhe sizing of the threadI lines e with very thick, tough sizing, madeof one part gum tragacanth and two parts of potato dextrine and usedwhile the sizing is in a moist condition, the 'stripping ofl nearlyallof the sizing -oi fromythe lines, the pressing of sizing into thelines, the Winding of the.

lines into the bobbins d on a winding support, the stretching of. thelines greatly in` winding, the holding of the lines from re` boundingand spoiling the bobbins, by the winding support till the sizingandbobbins can be dried, the drying of the sizing and bobbins whiletheir lines are held'fromrebound,-all to construct the bobbins so thatwhen they are removed from their winding support they will beselfsustaining thread masses, and' rigid entities adapted for internalbobbin uses in the shuttles f.

Having described my invention, what I claim as new and 4desire to secureby Letters Patent is:

1. A self-sustaining thread mass Acomposed of crossed coils, and dry andset sizing between said coils binding them together as a rigld entityland adapting said thread threa ternalbobbin uses while it is in a dryand normal condition.

3. The combination of a self-sustaining thread'mass of crossed coils,dry sizing set between them binding them together as a rigid entity andadapting said thread mass for reliable linternal bobbin use when ina dryand normal condition; and a shuttle structure in which said bobbin isused, adapted to o o-operate with lupper thread loops relatively smallas compared with the length of thread line in said' bobbin thread mass.

4. A cylindrical self-sustaining thread mass of crossed coils and drysizing set between them and binding them together into a rigid entityada ted for reliable internal sewing machine bo bin use when in its dryand normal condition,in combination with a cylindrical shuttlelstructure enclosing said thread mass, and closely fitting its peripheryand ends, and holding said thread mass stationary in said shuttle, andhaving a thin uniform thickness of wall,-said bobbin and shuttlestructures mutually contributing to adapt the combination for the use ofan unusual4 length of bobbin thread line with up-- per thread loops of agiven dimension.

5. A self-sustaining thread mass composed of stretched, and cross-woundthread coils, and dry sizing in the coils, and between them, and thecoils prevented from re- 1 bound, and held together in their relativewoun'g position, by said dry sizing, and the mass being thereby adaptedby the dry sizing, for reliable internal, and external, sewing Amachinebobbin uses while l in` its dry and normal conditions.

FRANK L. HMON.

